Benchmark DAC Thoughts

Robert TN  my system consists of the following/  Tekton DI speakers, SVS sb 4000 sub, Peachtree AMP 500, Benchmark LA-4 preamp and DAC 3B, Audio lab 6000cdt. I stream Amazon HD music trough a Windows based computer, USB , into my DAC 3, along with CD's. I listen to only Rock and Roll music quite loudly, near 100spl level. Since adding the LA-4 and DAC 3,   I can't begin to explain how much of an improvement I've heard. Not a 5 or 10% improvement, But maybe 50%. I can't get over the improved dynamics, clarity, openness!!!! Voices!!!!  I feel like I bought a brand new system. Rory, at Benchmark sold me on the combo preamp and DAC. He said a vast improvement over just the DAC, All I can say is, I'm VERY Impressed. HIGHLY RECOMMENDED!!!!  by the way, Benchmark is in NEW YORK, 30 day free trial period, 5 year warranty, and have been in business for many years. Rory will answer any questions you have, sound, hook up, etc.  Can't say enough good things. Robert TN